[Recognition of visual images by separate hemispheres in conditions of masked blocking of interhemispheric transmission]. / Razdel'noe obuchenie polusharii zritel'nomu raspoznavaniiu v usloviakh blokirovaniia maskirovkoi mezhnolusharnogo perenosa.

The subjects learned to recognize three figures presented in the left visual hemifield and three figures presented in the right visual hemifield. During presentation of a stimulus, the contralateral hemifield was overlapped by a mask. After the training, recognition of all six figures presented in the right and left visual hemifields, was compared. Each hemisphere recognizes figures which were learned in the corresponding visual hemifield, but the recognition of figures learned in the opposite visual hemifield was poor. Thus, the ability of the hemispheres to act separately in recognizing different sets of visual images, was established.

[Interhemispheric differences in the spatial-frequency description of images and the consequences for visual recognition]. / Mezhpolusharnye razlichiia v prostranstvenno-chastotnom opisanii izobrazhenii i nekotorye sledstviia dlia zritel'nogo opoznaniia.

Visual perception of images transformed by spatial-frequency filtering was investigated in tachistoscopic experiments. Evidences have been received that the left hemisphere describes preferentially low harmonics of an image, and right hemisphere--the high ones. A hypothesis is suggested that these differences are based on different sizes of the receptive fields of cortical modules. Some consequences of the proposed model are discussed--the consequences for the invariance of visual recognition (innate invariance mechanisms in the left hemisphere and learned invariance in the right hemisphere) and for the methods of visual image classification (discriminant or structural methods in the left and right hemisphere respectively). Some data confirming these predictions are presented.